Charlotte's Web (1973)

Continuity mistake: When Wilbur is meeting Charlotte's three daughters in the barn entrance, the medal that the farmer hung there keeps appearing and disappearing between shots, though the duration of the scene.

Continuity mistake: When Fern is celebrating Wilbur's two-week birthday, he is much smaller in size than in the song scene that played prior to the birthday.

Continuity mistake: They mention that the goose has hatched out 7 goslings. They say there were 8 eggs and one didn't hatch. The one egg is given to Templeton, and it is later smashed open. Later that night as they're going to sleep, the mother goose has 7 goslings under her, but then then it shows Jeffrey (one of the goslings) sleeping with Wilbur. Seems they had an extra gosling with the mother.

Wilbur: Are you writers?
Charlotte's daughters: No, but we will be when we grow up.
Wilbur: Then write this in your webs, when you learn: This hallowed doorway was once the home of Charlotte. She was brilliant, beautiful, and loyal to the end. Her memory will be treasured forever.
Charlotte's daughters: Ooh, that would take us a lifetime.
Wilbur: A lifetime. That's what we have.

Charlotte: Chin up, chin up / Everybody loves a happy face / Wear it, share it / It'll brighten up the darkest place / Twinkle, sparkle / Let a little sunshine in / You'll be on the right side, looking at the bright side / Up with your chinny-chin-chin.

Charlotte: Trust me, Wilbur. People are very gullible. They'll believe anything they see in print.